Question

我正在为黑莓设备实施QR码扫描程序，我正在使用ZXing库这样做。顺便说一句，这是针对os 6+的。我遇到的问题是，有时候，有时候，当相机打开准备扫描时，设备会冻结并完全重启......

否则它大部分时间都可以工作，我可以扫描和解码qr代码等。但似乎偶尔会感觉像是无缘无故崩溃。我不知道它是用相机还是我的代码中的东西，但我会提供代码。

public void scanBarcode() {

    // First we create a hashtable to hold all of the hints that we can
    // give the API about how we want to scan a barcode to improve speed
    // and accuracy.
    Hashtable hints = new Hashtable();

    // The first thing going in is a list of formats. We could look for
    // more than one at a time, but it's much slower.
    Vector formats = new Vector();
    formats.addElement(BarcodeFormat.QR_CODE);
    hints.put(DecodeHintType.POSSIBLE_FORMATS, formats);

    // We will also use the "TRY_HARDER" flag to make sure we get an
    // accurate scan
    hints.put(DecodeHintType.TRY_HARDER, Boolean.TRUE);

    // We create a new decoder using those hints
    BarcodeDecoder decoder = new BarcodeDecoder(hints);

    // Finally we can create the actual scanner with a decoder and a
    // listener that will handle the data stored in the barcode. We put
    // that in our view screen to handle the display.
    try {
        _scanner = new BarcodeScanner(decoder, new MyBarcodeDecoderListener());
        _barcodeScreen = new MyBarcodeScannerViewScreen(_scanner);

    } catch (Exception e) {
        return;
    }


    // If we get here, all the barcode scanning infrastructure should be set
    // up, so all we have to do is start the scan and display the viewfinder
    try {
        _scanner.stopScan();
        _scanner.getPlayer().start();
        _scanner.startScan();
        UiApplication.getUiApplication().pushScreen(_barcodeScreen);
    } catch (Exception e) {
    }

}

/***
 * MyBarcodeDecoderListener
 * <p>
 * This BarcodeDecoverListener implementation tries to open any data encoded
 * in a barcode in the browser.
 * 
 * @author PBernhardt
 * 
 **/
private class MyBarcodeDecoderListener implements BarcodeDecoderListener {

    public void barcodeDecoded(final String rawText) {

        //UiApplication.getUiApplication().popScreen(UiApplication.getUiApplication().getActiveScreen());
        UtilityDecoder.saveToHistory(rawText);

        try {
            UtilityDecoder.distributeBarcode(rawText);
        } catch (PIMException e) {
        }
    }

}

当我点击工具栏上的按钮时，我基本上会调用scanBarcode（）。

有人能告诉我我的代码是问题，还是设备或其他什么？提前感谢您提供的任何帮助！

Answer 1

试试这个链接：

Scan Any Type of Barcode Image which Supports Blackberry

请参阅此forun链接并查看该链接的讨论。当然，您将获得条形码扫描的整体概念，您还将获得在5.0版本中实现QRCode

Any type of Barcode scaning in 5.0

Zxing qr扫描黑莓崩溃

1 个答案: